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The title compound, C14H11N5O·C3H7NO, was synthesized by the reaction of 4-methoxy­benzaldehyde with malononitrile and ammonium acetate under microwave irradiation. The dihedral angle between the pyridine and benzene planes is 56.07 (8)°.

Supporting information

cif

Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536805039887/ci6717sup1.cif
Contains datablocks global, I

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S1600536805039887/ci6717Isup2.hkl
Contains datablock I

CCDC reference: 296538

Key indicators

  • Single-crystal X-ray study
  • T = 294 K
  • Mean [sigma](C-C) = 0.004 Å
  • R factor = 0.046
  • wR factor = 0.127
  • Data-to-parameter ratio = 12.6

checkCIF/PLATON results

No syntax errors found



Alert level C PLAT230_ALERT_2_C Hirshfeld Test Diff for C9 - C10 .. 5.08 su PLAT230_ALERT_2_C Hirshfeld Test Diff for C13 - C14 .. 5.96 su PLAT244_ALERT_4_C Low 'Solvent' Ueq as Compared to Neighbors for N6 PLAT371_ALERT_2_C Long C(sp2)-C(sp1) Bond C9 - C10 ... 1.42 Ang. PLAT371_ALERT_2_C Long C(sp2)-C(sp1) Bond C13 - C14 ... 1.43 Ang.
0 ALERT level A = In general: serious problem 0 ALERT level B = Potentially serious problem 5 ALERT level C = Check and explain 0 ALERT level G = General alerts; check 0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 4 ALERT type 2 Indicator that the structure model may be wrong or deficient 0 ALERT type 3 Indicator that the structure quality may be low 1 ALERT type 4 Improvement, methodology, query or suggestion

Comment top

3,5-Dicyanopyridine derivatives exhibit a wide range of bioactivities, such as antifungal, insecticidal, herbicidal, miticidal, nematocidal and antimicrobial activity (Gante & Lust, 1971). Some substituted 3,5-dicyanopyridines have recently been reported to exhibit a high conductance-type calcium-activated K-channel opening effect (Hirochika et al., 2003) and to be adenosine receptor-selective ligands (Rosentreter et al., 2002), which are useful in the treatment of many diseases. More importantly, they are also versatile intermediates in organic synthesis (Castedo et al., 1984). As a consequence, much attention has been paid to the synthesis of these derivatives during the past 50 years. We report here the crystal structure of the title compound, (I).

The 2,6-diamino-1,4-dihydropyridine-3,5-dicarbonitrile fragment of (I) (atoms C8–C14/N1–N5) is almost planar, with an r.m.s. deviation of 0.076 Å (Fig. 1). The dihedral angle between the pyridine and benzene planes is 56.07 (8)°.

The crystal packing shows that intermolecular N—H···O, N—H···N, C—H···O and C—H···N hydrogen bonds (Table 1) form a three-dimensional network (Fig. 2).

Experimental top

Compound (I) was prepared by the reaction of 4-methoxybenzaldehyde (1 mmol) with malononitrile (2 mmol) and ammonium acetate (1 mmol) under microwave irradiation for 4 min (yield 95%; m.p. 573 K). Single crystals of (I) suitable for X-ray diffraction were obtained by slow evaporation of an ethanol and N,N-dimethylformamide solution (Ratio of solvents?).

Refinement top

The H atoms of the amino group were located in a difference Fourier map and refined isotropically [N—H = 0.79 (3)–1.00 (3) Å]. All other H atoms were placed in idealized positions and allowed to ride on their parent atoms, with C—H distances of 0.93 or 0.96 Å, and with Uiso(H) = 1.5Ueq(C) for methyl H atoms and 1.2Ueq(C) for other H atoms.

Computing details top

Data collection: SMART (Bruker, 1998); cell refinement: SAINT (Bruker, 1999); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL (Bruker, 1999); software used to prepare material for publication: SHELXTL.

Figures top
[Figure 1] Fig. 1. The molecular structure (I), showing 30% probability displacement ellipsoids and the atom-numbering scheme.
[Figure 2] Fig. 2. The molecular packing of (I), viewed approximately along the c axis. Dashed lines indicate hydrogen bonds.
2,6-Diamino-4-(4-methoxyphenyl)-1,4-dihydropyridine-3,5-dicarbonitrile N,N-dimethylformamide solvate top
Crystal data top
C14H11N5O·C3H7NOZ = 2
Mr = 338.37F(000) = 356
Triclinic, P1Dx = 1.272 Mg m3
Hall symbol: -P 1Melting point: 573 K
a = 6.9580 (13) ÅMo Kα radiation, λ = 0.71073 Å
b = 9.5297 (18) ÅCell parameters from 1237 reflections
c = 14.695 (3) Åθ = 2.3–25.6°
α = 99.900 (3)°µ = 0.09 mm1
β = 102.505 (3)°T = 294 K
γ = 106.527 (3)°Plate, colourless
V = 883.1 (3) Å30.22 × 0.18 × 0.06 mm
Data collection top
Bruker SMART CCD area-detector
diffractometer
3087 independent reflections
Radiation source: fine-focus sealed tube1774 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.026
ϕ and ω scansθmax = 25.0°, θmin = 2.3°
Absorption correction: multi-scan
(SADABS; Sheldrick, 1996)
h = 68
Tmin = 0.976, Tmax = 0.995k = 1111
4506 measured reflectionsl = 1417
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.046Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.127H atoms treated by a mixture of independent and constrained refinement
S = 1.00 w = 1/[σ2(Fo2) + (0.0527P)2 + 0.1375P]
where P = (Fo2 + 2Fc2)/3
3087 reflections(Δ/σ)max = 0.001
245 parametersΔρmax = 0.18 e Å3
0 restraintsΔρmin = 0.20 e Å3
Crystal data top
C14H11N5O·C3H7NOγ = 106.527 (3)°
Mr = 338.37V = 883.1 (3) Å3
Triclinic, P1Z = 2
a = 6.9580 (13) ÅMo Kα radiation
b = 9.5297 (18) ŵ = 0.09 mm1
c = 14.695 (3) ÅT = 294 K
α = 99.900 (3)°0.22 × 0.18 × 0.06 mm
β = 102.505 (3)°
Data collection top
Bruker SMART CCD area-detector
diffractometer
3087 independent reflections
Absorption correction: multi-scan
(SADABS; Sheldrick, 1996)
1774 reflections with I > 2σ(I)
Tmin = 0.976, Tmax = 0.995Rint = 0.026
4506 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0460 restraints
wR(F2) = 0.127H atoms treated by a mixture of independent and constrained refinement
S = 1.00Δρmax = 0.18 e Å3
3087 reflectionsΔρmin = 0.20 e Å3
245 parameters
Special details top

Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes.

Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
O10.3300 (3)0.6323 (2)0.02945 (13)0.0636 (6)
N10.7128 (4)0.1842 (3)0.20947 (17)0.0634 (7)
N20.0778 (4)0.5285 (3)0.40879 (17)0.0658 (7)
N30.6437 (4)0.0727 (3)0.41777 (19)0.0555 (7)
H3A0.720 (4)0.060 (3)0.3788 (18)0.058 (8)*
H3B0.625 (4)0.004 (3)0.462 (2)0.076 (9)*
N40.4111 (3)0.1686 (2)0.47051 (14)0.0412 (5)
N50.1843 (4)0.2641 (3)0.52935 (17)0.0502 (6)
H5A0.105 (4)0.309 (3)0.5283 (18)0.051 (9)*
H5B0.177 (4)0.196 (3)0.572 (2)0.086 (10)*
C10.5031 (5)0.7464 (4)0.0204 (2)0.0716 (9)
H1A0.45790.78570.03330.107*
H1B0.60860.70390.01000.107*
H1C0.55960.82650.07820.107*
C20.3621 (4)0.5651 (3)0.10424 (17)0.0454 (7)
C30.5542 (4)0.5881 (3)0.16546 (18)0.0486 (7)
H30.67440.65340.15800.058*
C40.5676 (4)0.5134 (3)0.23843 (18)0.0466 (7)
H4A0.69810.52730.27880.056*
C50.3914 (4)0.4189 (3)0.25239 (16)0.0378 (6)
C60.1973 (4)0.3956 (3)0.18910 (17)0.0441 (6)
H6A0.07670.33140.19690.053*
C70.1833 (4)0.4669 (3)0.11536 (18)0.0484 (7)
H7A0.05380.44930.07280.058*
C80.4045 (4)0.3381 (3)0.33046 (17)0.0383 (6)
C90.5266 (4)0.2443 (3)0.33681 (17)0.0386 (6)
C100.6311 (4)0.2156 (3)0.26592 (19)0.0462 (7)
C110.5274 (4)0.1622 (3)0.40903 (18)0.0411 (6)
C120.2956 (4)0.2603 (3)0.46574 (17)0.0387 (6)
C130.2917 (4)0.3494 (3)0.39772 (16)0.0374 (6)
C140.1733 (4)0.4497 (3)0.40111 (17)0.0445 (7)
O20.0935 (3)0.9432 (2)0.33440 (16)0.0722 (6)
N60.0956 (4)0.8865 (3)0.23461 (17)0.0619 (7)
C150.1577 (7)0.9060 (5)0.1486 (3)0.1095 (14)
H15A0.12420.98960.12940.164*
H15B0.08460.81570.09780.164*
H15C0.30540.92580.16140.164*
C160.1581 (6)0.7810 (4)0.2847 (3)0.0931 (12)
H16A0.14500.80220.34890.140*
H16B0.30070.79140.28730.140*
H16C0.06990.67970.25090.140*
C170.0247 (5)0.9590 (3)0.2657 (2)0.0638 (8)
H17A0.05891.02730.23250.077*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
O10.0692 (13)0.0796 (15)0.0541 (12)0.0275 (12)0.0198 (10)0.0398 (11)
N10.0709 (17)0.0822 (19)0.0698 (17)0.0452 (15)0.0436 (14)0.0390 (14)
N20.0864 (19)0.0753 (18)0.0699 (17)0.0553 (16)0.0404 (14)0.0336 (14)
N30.0611 (16)0.0737 (17)0.0714 (17)0.0478 (14)0.0438 (14)0.0441 (15)
N40.0435 (12)0.0515 (13)0.0445 (13)0.0262 (11)0.0231 (10)0.0218 (10)
N50.0625 (16)0.0641 (17)0.0515 (15)0.0417 (14)0.0343 (13)0.0264 (13)
C10.089 (2)0.072 (2)0.070 (2)0.029 (2)0.0369 (19)0.0409 (18)
C20.0569 (18)0.0525 (17)0.0365 (15)0.0260 (14)0.0155 (13)0.0198 (13)
C30.0495 (17)0.0528 (17)0.0491 (16)0.0163 (14)0.0164 (14)0.0248 (14)
C40.0412 (15)0.0525 (17)0.0469 (16)0.0147 (13)0.0108 (12)0.0177 (14)
C50.0406 (15)0.0420 (15)0.0366 (15)0.0190 (12)0.0134 (12)0.0124 (12)
C60.0402 (15)0.0515 (16)0.0467 (16)0.0184 (13)0.0161 (13)0.0178 (13)
C70.0435 (16)0.0608 (18)0.0447 (16)0.0219 (14)0.0098 (13)0.0189 (14)
C80.0369 (14)0.0397 (14)0.0399 (15)0.0141 (12)0.0102 (12)0.0126 (12)
C90.0392 (14)0.0463 (15)0.0414 (15)0.0196 (12)0.0206 (12)0.0181 (12)
C100.0470 (16)0.0540 (17)0.0534 (17)0.0259 (14)0.0235 (14)0.0267 (14)
C110.0388 (14)0.0473 (16)0.0456 (16)0.0193 (13)0.0179 (12)0.0169 (13)
C120.0413 (14)0.0439 (15)0.0366 (14)0.0198 (12)0.0144 (12)0.0107 (12)
C130.0423 (15)0.0410 (15)0.0378 (14)0.0230 (12)0.0142 (12)0.0134 (12)
C140.0546 (16)0.0502 (17)0.0407 (16)0.0250 (14)0.0201 (13)0.0203 (13)
O20.0830 (16)0.0788 (15)0.0797 (15)0.0409 (13)0.0504 (13)0.0251 (12)
N60.0653 (16)0.0543 (15)0.0770 (18)0.0257 (13)0.0393 (14)0.0102 (13)
C150.125 (3)0.110 (3)0.104 (3)0.028 (3)0.079 (3)0.015 (2)
C160.088 (3)0.083 (3)0.122 (3)0.052 (2)0.031 (2)0.020 (2)
C170.065 (2)0.0528 (19)0.078 (2)0.0242 (16)0.0261 (18)0.0128 (17)
Geometric parameters (Å, º) top
O1—C21.373 (3)C5—C81.488 (3)
O1—C11.423 (3)C6—C71.375 (3)
N1—C101.147 (3)C6—H6A0.93
N2—C141.143 (3)C7—H7A0.93
N3—C111.336 (3)C8—C131.397 (3)
N3—H3A0.88 (3)C8—C91.398 (3)
N3—H3B1.00 (3)C9—C111.423 (3)
N4—C111.341 (3)C9—C101.426 (3)
N4—C121.345 (3)C12—C131.419 (3)
N5—C121.339 (3)C13—C141.429 (3)
N5—H5A0.79 (3)O2—C171.221 (3)
N5—H5B0.98 (3)N6—C171.332 (3)
C1—H1A0.96N6—C151.446 (4)
C1—H1B0.96N6—C161.451 (4)
C1—H1C0.96C15—H15A0.96
C2—C31.374 (3)C15—H15B0.96
C2—C71.389 (3)C15—H15C0.96
C3—C41.387 (3)C16—H16A0.96
C3—H30.93C16—H16B0.96
C4—C51.378 (3)C16—H16C0.96
C4—H4A0.93C17—H17A0.93
C5—C61.397 (3)
C2—O1—C1118.2 (2)C9—C8—C5120.5 (2)
C11—N3—H3A121.8 (17)C8—C9—C11119.3 (2)
C11—N3—H3B119.3 (16)C8—C9—C10121.4 (2)
H3A—N3—H3B118 (2)C11—C9—C10118.9 (2)
C11—N4—C12118.6 (2)N1—C10—C9176.1 (3)
C12—N5—H5A122.4 (19)N3—C11—N4116.7 (2)
C12—N5—H5B121.0 (17)N3—C11—C9120.9 (2)
H5A—N5—H5B116 (3)N4—C11—C9122.4 (2)
O1—C1—H1A109.5N5—C12—N4116.4 (2)
O1—C1—H1B109.5N5—C12—C13121.3 (2)
H1A—C1—H1B109.5N4—C12—C13122.3 (2)
O1—C1—H1C109.5C8—C13—C12119.4 (2)
H1A—C1—H1C109.5C8—C13—C14122.0 (2)
H1B—C1—H1C109.5C12—C13—C14118.6 (2)
O1—C2—C3124.6 (3)N2—C14—C13176.1 (3)
O1—C2—C7115.4 (2)C17—N6—C15120.8 (3)
C3—C2—C7120.0 (2)C17—N6—C16120.0 (3)
C2—C3—C4119.5 (3)C15—N6—C16119.1 (3)
C2—C3—H3120.2N6—C15—H15A109.5
C4—C3—H3120.2N6—C15—H15B109.5
C5—C4—C3121.4 (2)H15A—C15—H15B109.5
C5—C4—H4A119.3N6—C15—H15C109.5
C3—C4—H4A119.3H15A—C15—H15C109.5
C4—C5—C6118.5 (2)H15B—C15—H15C109.5
C4—C5—C8121.7 (2)N6—C16—H16A109.5
C6—C5—C8119.8 (2)N6—C16—H16B109.5
C7—C6—C5120.5 (2)H16A—C16—H16B109.5
C7—C6—H6A119.8N6—C16—H16C109.5
C5—C6—H6A119.8H16A—C16—H16C109.5
C6—C7—C2120.2 (2)H16B—C16—H16C109.5
C6—C7—H7A119.9O2—C17—N6125.2 (3)
C2—C7—H7A119.9O2—C17—H17A117.4
C13—C8—C9117.8 (2)N6—C17—H17A117.4
C13—C8—C5121.6 (2)
C1—O1—C2—C37.3 (4)C5—C8—C9—C104.0 (4)
C1—O1—C2—C7173.3 (2)C12—N4—C11—N3178.4 (2)
O1—C2—C3—C4179.7 (2)C12—N4—C11—C92.4 (4)
C7—C2—C3—C40.4 (4)C8—C9—C11—N3179.3 (2)
C2—C3—C4—C51.5 (4)C10—C9—C11—N37.8 (4)
C3—C4—C5—C62.1 (4)C8—C9—C11—N41.5 (4)
C3—C4—C5—C8179.9 (2)C10—C9—C11—N4171.3 (2)
C4—C5—C6—C70.7 (4)C11—N4—C12—N5179.2 (2)
C8—C5—C6—C7178.6 (2)C11—N4—C12—C130.4 (4)
C5—C6—C7—C21.2 (4)C9—C8—C13—C123.4 (3)
O1—C2—C7—C6178.9 (2)C5—C8—C13—C12174.7 (2)
C3—C2—C7—C61.7 (4)C9—C8—C13—C14175.9 (2)
C4—C5—C8—C13126.0 (3)C5—C8—C13—C146.0 (4)
C6—C5—C8—C1356.1 (3)N5—C12—C13—C8177.8 (2)
C4—C5—C8—C955.9 (3)N4—C12—C13—C82.6 (4)
C6—C5—C8—C9121.9 (3)N5—C12—C13—C142.9 (4)
C13—C8—C9—C111.5 (4)N4—C12—C13—C14176.7 (2)
C5—C8—C9—C11176.7 (2)C15—N6—C17—O2175.9 (3)
C13—C8—C9—C10174.2 (2)C16—N6—C17—O21.3 (5)
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
N3—H3A···O2i0.88 (3)2.07 (3)2.846 (3)147 (2)
N3—H3B···N4ii1.00 (3)2.04 (3)3.033 (3)168 (2)
N5—H5A···N2iii0.79 (3)2.45 (3)3.195 (3)158 (2)
N5—H5B···O2iii0.98 (3)2.13 (3)3.083 (3)166 (2)
C6—H6A···N1iv0.932.593.506 (4)171
C7—H7A···O1v0.932.583.503 (4)170
C17—H17A···N1vi0.932.483.288 (4)145
Symmetry codes: (i) x+1, y1, z; (ii) x+1, y, z+1; (iii) x, y+1, z+1; (iv) x1, y, z; (v) x, y+1, z; (vi) x1, y+1, z.

Experimental details

Crystal data
Chemical formulaC14H11N5O·C3H7NO
Mr338.37
Crystal system, space groupTriclinic, P1
Temperature (K)294
a, b, c (Å)6.9580 (13), 9.5297 (18), 14.695 (3)
α, β, γ (°)99.900 (3), 102.505 (3), 106.527 (3)
V3)883.1 (3)
Z2
Radiation typeMo Kα
µ (mm1)0.09
Crystal size (mm)0.22 × 0.18 × 0.06
Data collection
DiffractometerBruker SMART CCD area-detector
diffractometer
Absorption correctionMulti-scan
(SADABS; Sheldrick, 1996)
Tmin, Tmax0.976, 0.995
No. of measured, independent and
observed [I > 2σ(I)] reflections
4506, 3087, 1774
Rint0.026
(sin θ/λ)max1)0.595
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.046, 0.127, 1.00
No. of reflections3087
No. of parameters245
H-atom treatmentH atoms treated by a mixture of independent and constrained refinement
Δρmax, Δρmin (e Å3)0.18, 0.20

Computer programs: SMART (Bruker, 1998), SAINT (Bruker, 1999), SAINT, SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), SHELXTL (Bruker, 1999), SHELXTL.

Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
N3—H3A···O2i0.88 (3)2.07 (3)2.846 (3)147 (2)
N3—H3B···N4ii1.00 (3)2.04 (3)3.033 (3)168 (2)
N5—H5A···N2iii0.79 (3)2.45 (3)3.195 (3)158 (2)
N5—H5B···O2iii0.98 (3)2.13 (3)3.083 (3)166 (2)
C6—H6A···N1iv0.932.593.506 (4)171
C7—H7A···O1v0.932.583.503 (4)170
C17—H17A···N1vi0.932.483.288 (4)145
Symmetry codes: (i) x+1, y1, z; (ii) x+1, y, z+1; (iii) x, y+1, z+1; (iv) x1, y, z; (v) x, y+1, z; (vi) x1, y+1, z.
 

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